5'-O-thymidylyl-4-thiothymidine 以5%的产率得到(1R,8S,9R,14R,16R,17S,22R,23S)-19,23-dihydroxy-16-(hydroxymethyl)-6,9-dimethyl-19-oxo-9-sulfanyl-15,18,20,25-tetraoxa-2,4,11,13-tetraza-19lambda5-phosphahexacyclo[20.2.1.114,17.02,5.04,7.08,13]hexacos-6-ene-3,10,12-trione